R307. Environmental Quality, Air Quality. 

R307-.348. Magnet Wire Coatings. 

RJ07-348-l. Pm·pose. 

The purpose of this rule is to limit volatile organic 

compound (VOC) emissions from ovens of magnet wire 

coating operations. 

R307-348-2. Applicability. 

(I) R307-34X applie-; lo sources located in Cache. 

Davis. Salt Lake. Utah and Wehcr counties that have the 

potential to emit 2.7 l011S per year or more of V()C. including 

related ekaning activities. 

(2) In Box Elder and Tooele cou nties. R307-J48 

applies to the following sources: 

\a) Existing sources as of Febn1af) I, 20 l 3, with the 

potential to emit 5 tons per yem or more of voe, including 

related ckaning activities; and 

( b) New sources as of February l, 2013. that ha •·e 

the potential to emit 2. 7 tons per yt-ar or more of VOC. 

including related cleaning activities. 

R307-348-3. Definitions, 

fhc following additional definition applies to R307-

348: 

"Magnet wire coating" means the process of applying 

coating or electrical insulating varnish or enamel to aluminum 

or copper wire for use in electrical machinery. 

R307-348-4. Emission Standards. 

(1) No owner or operator of a magnet wire coating 

oven may cause. allow or permit discharge into the atmosphere 

of any VOC in excess of0.20 kilograms per Liter of coming (l. 7 

pounds per gallon). excluding water. and exempt solvents 

(compounds no( classified as vo-'.s) delivered to th~ coating 

applicator from magnet wire coating operations. 

(a) Equivakncy calculations for coatings shall be 

performed in units of pounds voes per gallon of solid rather 

than pounds voes per gallon of coating when detcm1ining 

cornplianci:: . 

(b) The equ ivalent emission limit is 2.2 pounds 

voes per gallon sol.ids. 

(2) The emission limitations specified above shall be 

achieved by· 

(a) The application of low solvent content coaling 

technology: or 

(b) The use of an add-on control device on m~gn l 

wire coating ovens ns specified in R307-348-6. 

R307-J48-5. Work Practices and Recordkeeping. 

( l) The owner or operator shal l. 

(a) Store all VOC-containing coatings and clcnning 

materials in closed contc1iners; 

(bJ Minimi~ spills ofYOC-conraining coatings <md 

cleaning materials. 

(c) Clean up spills immediately: 

(d) C'onve; any coatings. thi nners. and ckaning 

m.llerials in closed containers or pipes: 

(e) Close mixing vessels that contain VOC coatings 

and other materials cxcc t when spccilkally in use: and 

(!) .\1inimi1c usage of solvents during cleaning or storage. mixing. and conveying equipment. 

(2) All sources subject to R.307-348 shall maintain 

records d(!monstrating compliance with all provisions ofR307-

348. and these records shall be available to the director upon 

request. 

R307-348-6. Optional Add-On Controls. 

{ 1) rhc owner or operator mny install and maintain 

an 

in..:ineralor provided that the emission control device will attain 

at least 90% efficiency pcrtom1m1ce. 

\2) The owner or operator of a control device shall 

provide documentation that the emission control system will 

attain tht: requirements ofR307-348-6. 

(3) Emission control systems shall be operated and 

maintained in a(.ccordance with the manufacturer 

recommendations. The owner or operator shall maintain for a 

mmimum of two years records of operating and maintenance 

sufiicient to demonstrate that the equipment is being operated 

and maintained in accordance with the manufacturer 

recommendations. 

R307-348-7. Compliance Schedule. 

( J) All sources in Davis and Sall. Lake counties are 

subject to this rule as of the effective date of this rule . 

(2) Sources in Box Elder, Cache, Utah. Tooele, and 

\Vcber counties shall be in compliance with this rnlc by .January 

I. 2014. 

KEY: air pollution, emission controls, surface coating, 

magnet wire 

Date of Enactment or Last Substantive Amendment: 

February I, 2013 

Authorizing, and Implemented or Interpreted Law: l 9-2-

104(l)(a) 

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